Suno Voice Generation Callback

System will call this callback when Suno Voice generation is complete.

The final result of a custom voice is sent to the callBackUrl of the validation-phrase task (the task whose taskId you passed to create-voice). create-voice itself returns success immediately; that only means the request was accepted. The Voice ID is the taskId of the validation-phrase task.

Callback Mechanism Overview

Webhook Security

To ensure the authenticity and integrity of callback requests, we strongly recommend implementing webhook signature verification. See our Webhook Verification Guide for detailed implementation steps.

Callback Timing

The system will send callback notifications in the following situations:

Voice generation completed successfully

Voice generation failed

Errors occurred during voice generation processing

Callback Method

HTTP Method: POST

Content Type: application/json

Timeout Setting: 15 seconds

Callback Request Format

When the validation-phrase task reaches its final state, the system sends a POST request to that task's callBackUrl in the following format:

Success Callback

Failure Callback

{
  "code": 200,
  "msg": "success",
  "data": {
    "taskId": "xxx_task_id_xxx",
    "status": "success",
    "errorCode": null,
    "errorMessage": ""
  }
}

Status Code Description

code (integer, required)

Callback status code indicating task processing result:

Status Code	Description
200	Success - Voice has been generated successfully
500	Failed - Voice generation failed or internal processing error occurred

msg (string, required)

Status message providing detailed status description.

data.taskId (string, required)

Task ID of the validation-phrase task. This is the Voice ID: pass it as persona_id together with persona_model: "voice_persona" in Generate Music.

data.status (string)

Final task status.

Status	Description
success	The voice is ready to use
fail	The recording did not pass verification

data.errorCode (integer)

Error code. Usually null when the task succeeds.

data.errorMessage (string)

Detailed error message. Usually empty when the task succeeds.

Callback Reception Examples

Here are example codes for receiving callbacks in popular programming languages:

Node.js

Python

PHP

Best Practices

Callback URL Configuration Recommendations

Use HTTPS: Ensure your callback URL uses HTTPS protocol for secure data transmission

Verify Source: Verify the legitimacy of the request source in callback processing

Idempotent Processing: The same taskId may receive multiple callbacks, ensure processing logic is idempotent

Quick Response: Callback processing should return a 200 status code as quickly as possible to avoid timeout

Asynchronous Processing: Complex business logic should be processed asynchronously to avoid blocking callback response

Persist the Voice ID: Save the validation-phrase taskId; it is the Voice ID used as persona_id in later generation requests

Important Reminders

Callback URL must be a publicly accessible address

Server must respond within 15 seconds, otherwise it will be considered a timeout

If 3 consecutive retries fail, the system will stop sending callbacks

Please ensure the stability of callback processing logic to avoid callback failures due to exceptions

Save the Voice ID (the validation-phrase taskId) promptly after success, because it is required for later voice-based generation

Troubleshooting

If you do not receive callback notifications, please check the following:

Network Connection Issues

Confirm that the callback URL is accessible from the public network

Check firewall settings to ensure inbound requests are not blocked

Verify that domain name resolution is correct

Server Response Issues

Ensure the server returns HTTP 200 status code within 15 seconds

Check server logs for error messages

Verify that the interface path and HTTP method are correct

Content Format Issues

Confirm that the received POST request body is in JSON format

Check that Content-Type is application/json

Verify that JSON parsing is correct

Suno Voice Generation Callback

Callback Mechanism Overview#

Callback Timing#

Callback Method#

Callback Request Format#

Status Code Description#

code (integer, required)#

msg (string, required)#

data.taskId (string, required)#

data.status (string)#

data.errorCode (integer)#

data.errorMessage (string)#

Callback Reception Examples#

Best Practices#

Troubleshooting#

Callback Mechanism Overview

Callback Timing

Callback Method

Callback Request Format

Status Code Description

code (integer, required)

msg (string, required)

data.taskId (string, required)

data.status (string)

data.errorCode (integer)

data.errorMessage (string)

Callback Reception Examples

Best Practices

Troubleshooting